Undercutter guide for crosscut-saws.



l. C. DRAKE.

UNDERCUTTER GUIDE FOR CROSSCUT SAWS.

APPLICATION men SEPT. z. 1916.

1,277,050 Patented Aug. 27, 1918.

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UNDERCUTTER GUIDE FOR CROSSCUT SAWS.

APPLICATKON FILED SEPT. I. IQIG- Patented Aug. 27, 1918:.

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I RA G. DRAKE, OF ROCHESTER, WASHINGTON.

UNDERCUTTER GUIDE FOR CROSSCUT-SAWS.

Specification of Letters Patent.

Patented Aug. 2'7, 1918.

Application filed September 1, 1916. Serial No. 118,064.

To all whom it may concern:

Be it known that I, IRA G. DRAKE, a citi- Zen of the United States, residing at Rochester, in the county of Thurston and State of lVashington, have invented certain new .and useful Improvements in Undercutter Guides for Crosscut-Saws; and I do hereby declare the following to he a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it ap pertains to make and use the same.

The invention relates to improvements in undercutter guides for cross cut saws.

The object of the present invention is to improve the construction of undercutter guides for cross cut saws and to provide a simple, practical and efiicient undercutter guide of stron durable and inexpensive construction equipped with an ordinary chisel adapted to support the guide on a log and capable of being removed and being used to cut off slabs for releasing a saw should the same become necessary.

A further object of the invention is to provide an undercutter guide of this character equipped with means for enabling the guide support and the chisel to be adjusted independently of each other and to be secured in their adjustment by a single clamping operation l/Vith these and other objects in view, the invention consists in the construction and novel combination of parts hereinafter fully described, illustrated in the accompanying drawing, and pointed out in the claims here to appended; it being understood that various changes in the form,-proportion, size and minor details of construction, within the scope of the claims, may be resorted to withoutdeparting from the spirit or sacrificing any of the advantages of the invention.

In the drawings Figure 1 is a plan view of an undercutter guide constructed in accordance with this invention,

Fig. 2 is a side elevation of the same illustrating the manner of mounting the device on a log,

Fig. 3 is an elevation illustrating the opposite side-of the device and showing the manner of supporting and guiding a cross cut saw,

Fig. 4 is a transverse sectional view on the line &l of Fig. 2,

Fig. 5 is a detail sectional view illustrating the construction of the rotary cylindrical member of the clamp,

Fig. 6 is a detail perspective of the slidable tubular member of the clamp,

Fig. 7 is a detail perspective view of the plug.

Like numerals of reference designate corresponding parts in the several figures of the drawings.

In the accompanying drawings in which is illustrated the preferred embodiment of the invention, the undercutter guide comprises in its construction, a relatively rotary cylindrical clamping member 1 and a slidable tubular transversely disposed sup port 2provided with a longitudinal slot 3 for the reception of a chisel & and interiorly threaded at one end 5 of its bore or opening 6. The cylindrical clamping member and the pivot are capable of relative rotary adjustment throughout a complete revolution owing to the mounting of the cylindrical member on the outer end of the tubular pivot member beyond the clamping means hereinafter described. The cylindrical clamping member is provided at its inner end with an inwardly extending annular flange 7 forming a bearing for the slida ble wheel 12 secured to the shaft 11 in proper position thereon by inner and outer cotter pins 13 or other suitable fastening devices, washers 14 being interposed between the ends of the grooved saw guiding roller or wheel 12. lhe arm 10 extends downwardly through the opposite openings 9 of the cylindrical member 1 and it is adapted to be adjusted upwardly and downwardly and the said cylindrical member is capable of rotary movement on the slidable tubular support to arrange the supporting arm. 10 in the desired position. The chisel is of the ordinary construction and when removed from the device may be employed for various purposes. It is adapted to be driven into a log 15 in the usual manner and the tubular support 2 on which the cylindrical rotary member is adapted to turn, may he moved inwardly and outwardly on the blade of the chisel to arrange the guide wheel the desired distance from the log 15 so that a saw 16 may be supported and guided by the grooved wheel 12 and maintained in proper position with relation to the log. The interiorly threaded slidable support 2 receives a clamp ing or adjusting screw 17 QI'ON-lClBCl with a suitable handle 18 and adapted to engage one edge of the chisel as clearly shown in Fig. 4 of the drawings. This adjusting of the screw 17 simultaneously forces a plug 19 into engagement with the inner side edge of the arm 10. The wedge 19 is interposed between the arm and the inner side edge of the chisel. It will thus be seen that the screw engages the outer side edge of the chisel 1 and forces the latter against the adjacent end of the plug 19 and causes the same to engage and clamp the supporting arm between it and the outer walls of the openings 9. By this construction a simple, efl'ective and quick acting single adjustment is provided for securing both the arm and the chisel to the support and rotary member of the clamp. lhe chisel is adapted to be readily driven into a log for supporting the undercutter guide and it is adapted for cutting off slabs that often split down in cutting the log.

In practice the'log will split down and a small slab will catch the saw so that it has to be cut loose and while the chisel is especially advantageous for this purpose it may be employed for a variety or other purposes where a tool of this character is desired and also a similar instrument may be substituted for the chisel as will be readily understood.

What is claimed is 1. A device of the class described comprising a hollow tubular SUPPOlt having a longitudinal slot terminating short of the ends thereof, an outwardly directed flange at the inner end of said support, a hollow cylindrical head mounted upon said support and projecting beyond the inner end thereof and provided with alined openings in its sides, said head being adapted to be rotated and moved axially upon said support,an inwardly directed flange at the inner end of said head adapted to cotiperate with the flange of said support to prevent the displacement of the head in one direction, a tool passing through the slot of said supportand adapted to prevent the displacement of the head in the reverse direction, an arm passing through the slots in the head, a roller carried by the arm, a pin carried by the support between and engaging the tool and arm, and a tail bolt threaded to the other end of the sup port and adapted to be adjusted into engagement with the tool to look all the parts against any relative movements.

2. A device of the class described including a tubular support having a longitudinal slot therein, an exterior flange at one end of said support, a cylindrical member rotatably mounted on said support and about said flange, a tool extended through said slot of the support for holding the cylindrical member against movement thereon, an arm extending through said cylindrical member outwardly beyond the flange, a pin located in said support and having one end bearing against the inner edge of the tool and its opposite end against one edge of the arm, and a tail bolt threaded to the outer end of the support and adapted to be adjusted into engagement with the tool to lock all the parts against relative movement.

3. A device of the class described including a tubular support having a longitudinal slot therein, an exterior annular flange at one end of the support, a cylindrical member rotatably mounted onand about the flange of the support, a tool extending through the slot of the support and limiting the movement of the cylindrical member in one direction thereon, an arm extended through the cylindrical member beyond the flange of the support, a pin located in the support and bearing against the arm and tool, and a tail bolt fitted in the open end of the support and adapted to be adjusted into engagement with the tool for holding and looking all the parts against relative movement.

4:. An undercutter guide of the class described including a tubular pivot member having a longitudinal opening interiorly threaded at one end, said pivot member be- 7 ing provided with a longitudinal slot and having an annular flange at the end opposite that which is interiorly threaded, a cylindrical rotary member provided at its inner end with an inwardly extending anchisel located within the said slot of the In testimony whereof I afiix my signature pivot member, a plug interposed between in presence of two witnesses.

the ch sel and the supportl ng arm and an IRA C. DRAKE. ad usting screw mounted 1n the threaded end of the pivot member engaging the Witnesses:

chisel whereby the chisel and the support- CLYDE PATON,

ing arm are clamped in a single operation. CHAS. W. RAU.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. G. I 

